Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ian M Frankfort MD, Stuart Rubin MD and Daniel J Mcmahon MD

Family Medicine Physician in Williamsville, NY · enumerated 2006 · authorized official Ian Frankfort, Partner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1609984780

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Ian M Frankfort MD, Stuart Rubin MD and Daniel J Mcmahon MD

Practice address 747 Hopkins Rd, Williamsville, NY, 14221

Phone (716) 688-5132

Fax (716) 688-3022

Enumeration date Aug 28, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 116558 (NY) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 117197 (NY) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 120885 (NY) Primary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F3002291 (NY) Secondary

Authorized official

Name Ian Frankfort

Title Partner

Phone (716) 688-5132

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Ian M Frankfort MD, Stuart Rubin MD and Daniel J Mcmahon MD?

The NPI for Ian M Frankfort MD, Stuart Rubin MD and Daniel J Mcmahon MD is 1609984780, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Ian M Frankfort MD, Stuart Rubin MD and Daniel J Mcmahon MD?

NPPES lists Ian Frankfort (Partner) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.